The physics of sediment transport initiation, cessation, and entrainment across aeolian and fluvial environments

T Pähtz, AH Clark, M Valyrakis… - Reviews of …, 2020 - Wiley Online Library
Predicting the morphodynamics of sedimentary landscapes due to fluvial and aeolian flows
requires answering the following questions: Is the flow strong enough to initiate sediment …

Sand ripples and dunes

F Charru, B Andreotti, P Claudin - Annual Review of Fluid …, 2013 - annualreviews.org
An erodible bed sheared by a fluid flow, gas or liquid, is generally unstable, and bed forms
grow. This review discusses the following issues, in light of the recent literature: What are the …

[图书][B] Granular media: between fluid and solid

B Andreotti, Y Forterre, O Pouliquen - 2013 - books.google.com
Sand, rice, sugar, snow, cement... Although ubiquitous in our daily lives, granular media still
challenge engineers and fascinate researchers. This book provides the state-of-the-art of the …

Interface-resolved direct numerical simulation of the erosion of a sediment bed sheared by laminar channel flow

AG Kidanemariam, M Uhlmann - International Journal of Multiphase Flow, 2014 - Elsevier
A numerical method based upon the immersed boundary technique for the fluid–solid
coupling and on a soft-sphere approach for solid–solid contact is used to perform direct …

Sediment dynamics. Part 1. Bed-load transport by laminar shearing flows

M Ouriemi, P Aussillous, E Guazzelli - Journal of Fluid Mechanics, 2009 - cambridge.org
We propose a two-phase model having a Newtonian rheology for the fluid phase and friction
for the particle phase to describe bed-load transport in the laminar viscous regime. We have …

Bedforms in a turbulent stream: formation of ripples by primary linear instability and of dunes by nonlinear pattern coarsening

A Fourriere, P Claudin, B Andreotti - Journal of Fluid Mechanics, 2010 - cambridge.org
It is widely accepted that both ripples and dunes form in rivers by primary linear instability;
the wavelength of the former scaling on the grain size and that of the latter being controlled …

Selection of the ripple length on a granular bed sheared by a liquid flow

F Charru - Physics of fluids, 2006 - pubs.aip.org
The stability of a granular bed sheared by a liquid flow is investigated using an erosion-
deposition model for the moving grains. Extending to arbitrary wave number a previous long …

Unification of aeolian and fluvial sediment transport rate from granular physics

T Pähtz, O Durán - Physical Review Letters, 2020 - APS
One of the physically least understood characteristics of geophysical transport of sediments
along sediment surfaces is the well-known experimental observation that the sediment …

Investigation of the mobile granular layer in bedload transport by laminar shearing flows

P Aussillous, J Chauchat, M Pailha… - Journal of Fluid …, 2013 - cambridge.org
The mobile layer of a granular bed composed of spherical particles is experimentally
investigated in a laminar rectangular channel flow. Both particle and fluid velocity profiles …

Determination of the critical Shields number for particle erosion in laminar flow

M Ouriemi, P Aussillous, M Medale, Y Peysson… - Physics of …, 2007 - pubs.aip.org
We present reproducible experimental measurements for the onset of grain motion in
laminar flow and find a constant critical Shields number for particle erosion, ie, θ c …